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Aktuelle Fachpublikationen

O-Transfer-facilitated Cyclizations of Propargylamides with TMSN3: Selective Synthesis of Tetrazoles and Dihydroimidazoles

An unprecedented formal [3+2] annulation of propargylamides with TMSN3 to deliver functionalized tetrazoles is developed. Oxygen-atom transfer (OAT) from amide group to C≡C bond was realized via a NIS-triggered-cyclization/ring-opening cascade pathway. The OAT process enables the amide to s ... mehr

Intracellular detection of Cu2+ and S2- ions through a quinazoline functionalized benzimidazole-based new fluorogenic differential chemosensor

A new quinazoline functionalized benzimidazole-based fluorogenic chemosensor H3L is synthesized and fully characterized by conventional techniques including single crystal X-ray analysis. It acts as a highly selective colorimetric and fluorescence sensor for Cu2+ ions in DMF/0.02 M HEPES (1 ... mehr

One-step Synthesis of SnO2 Nanoparticles-Loaded Graphitic Carbon Nitride and their Application in Thermal Decomposition of Ammonium Perchlorate

SnO2 nanoparticles-loaded graphitic carbon nitride (SnO2NPs/g-C3N4) hybrids were successfully synthesized by one-pot calcining. Various characterization means and detection techniques were used to analyse their structure and properties. It was found that SnO2 NPs possess the synergistic eff ... mehr

Facile preparation of Chevreul's salt (Cu2SO3[round bullet, filled]CuSO3[round bullet, filled]2H2O) mesocrystalline microspheres and its high photocatalytic activity

Cu2SO3•CuSO3•2H2O mesocrystalline microspheres were successfully prepared by a facile method for the first time. Section image of the products displayed that microspheres included a peanut-like core consisting of packed particles and a shell composed of particles in oriented attachment fash ... mehr

Degradation of HaloTag-fused nuclear proteins using bestatin-HaloTag ligand hybrid molecules

We have developed protein knockdown technology using small molecules consisting of a ligand for the target protein linked to a ligand for ubiquitin ligase. However, this technology has several limitations. Here, we report the development of a novel protein knockdown system to address these ... mehr

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Flow-Induced Stress on Adherent Cells in Microfluidic Devices

Transduction of mechanical forces and chemical signals affect every cell in the human body. Fluid flow in systems such as the lymphatic or circulatory systems modulates not only cell morphology, but also gene expression patterns, extracellular matrix protein secretion and cell-cell and cell ... mehr

Engineering fluidic delays in paper-based devices using laser direct writing

We report the use of a new laser-based direct-write technique that allows programmable and timed fluid delivery in channels within a paper substrate which enables implementation of multi-step analytical assays. The technique is based on laser-induced photo-polymerisation, and through adjust ... mehr

A FRET-based ratiometric fluorescent aptasensor for rapid and onsite visual detection of ochratoxin A

AA color change observable by the naked eye to indicate the content of an analyte, is considered to be the most conceivable way of various sensing protocols. By taking advantage of the Förster resonance energy transfer (FRET) principles, we herein designed a dual-emission ratiometric fluore ... mehr

Precise analysis of calcium stable isotope variations in biological apatites using laser ablation MC-ICPMS

Laser ablation (LA) is potentially an interesting technique to measure natural variations (δ44/42Ca) of calcium isotopes in calcium-rich minerals because it allows spatial resolution and avoids micro-sampling and consecutive wet chemistry. We developed a matrix-match sample/standard normali ... mehr

Fluorescent metal ion chemosensors via cation exchange reactions of complexes, quantum dots, and metal-organic frameworks

Due to their wide range of applications and biological significances, fluorescent sensors have been an active research area in the past a few years. In the present review, recent research developments towards fluorescent chemosensors that detect metal ions via cation exchange reactions (tra ... mehr

Alle Fachpublikationen zu Analytik

O-Transfer-facilitated Cyclizations of Propargylamides with TMSN3: Selective Synthesis of Tetrazoles and Dihydroimidazoles

An unprecedented formal [3+2] annulation of propargylamides with TMSN3 to deliver functionalized tetrazoles is developed. Oxygen-atom transfer (OAT) from amide group to C≡C bond was realized via a NIS-triggered-cyclization/ring-opening cascade pathway. The OAT process enables the amide to s ... mehr

Intracellular detection of Cu2+ and S2- ions through a quinazoline functionalized benzimidazole-based new fluorogenic differential chemosensor

A new quinazoline functionalized benzimidazole-based fluorogenic chemosensor H3L is synthesized and fully characterized by conventional techniques including single crystal X-ray analysis. It acts as a highly selective colorimetric and fluorescence sensor for Cu2+ ions in DMF/0.02 M HEPES (1 ... mehr

One-step Synthesis of SnO2 Nanoparticles-Loaded Graphitic Carbon Nitride and their Application in Thermal Decomposition of Ammonium Perchlorate

SnO2 nanoparticles-loaded graphitic carbon nitride (SnO2NPs/g-C3N4) hybrids were successfully synthesized by one-pot calcining. Various characterization means and detection techniques were used to analyse their structure and properties. It was found that SnO2 NPs possess the synergistic eff ... mehr

Facile preparation of Chevreul's salt (Cu2SO3[round bullet, filled]CuSO3[round bullet, filled]2H2O) mesocrystalline microspheres and its high photocatalytic activity

Cu2SO3•CuSO3•2H2O mesocrystalline microspheres were successfully prepared by a facile method for the first time. Section image of the products displayed that microspheres included a peanut-like core consisting of packed particles and a shell composed of particles in oriented attachment fash ... mehr

Degradation of HaloTag-fused nuclear proteins using bestatin-HaloTag ligand hybrid molecules

We have developed protein knockdown technology using small molecules consisting of a ligand for the target protein linked to a ligand for ubiquitin ligase. However, this technology has several limitations. Here, we report the development of a novel protein knockdown system to address these ... mehr

Alle Fachpublikationen zu Chemie

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 95, 974 (September 2015). doi:10.1038/labinvest.2015.102 mehr

Tissue-type plasminogen activator suppresses activated stellate cells through low-density lipoprotein receptor-related protein 1

Tissue-type plasminogen activator suppresses activated stellate cells through low-density lipoprotein receptor-related protein 1 Laboratory Investigation advance online publication, August 3 2015. doi:10.1038/labinvest.2015.94 Authors: Liang-I Kang, Kumiko Isse, Kelly Koral, W ... mehr

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 95, 844 (August 2015). doi:10.1038/labinvest.2015.92 mehr

Inside the USCAP Journals

Inside the USCAP Journals Laboratory Investigation 95, 700 (July 2015). doi:10.1038/labinvest.2015.75 mehr

Clinical significance of the integrin |[alpha]|6|[beta]|4 in human malignancies

Clinical significance of the integrin α6β4 in human malignancies Laboratory Investigation advance online publication, June 29 2015. doi:10.1038/labinvest.2015.82 Authors: Rachel L Stewart & Kathleen L O'Connor mehr

Alle Fachpublikationen zu Labortechnik

H2S Reactive Absorption from Off‐gas in a Spray Column: Insights from Experimental and Modeling

Abstract H2S removal from off‐gas stream was performed in a spray column by H2S reactive absorption into NaOH solution. The individual and interactive effects of three independent operating variables on percentage of absorbed H2S were investigated: the initial pH of scrubbing solution (p ... mehr

Retention of biopolymers by ultrafiltration membranes

Abstract Separation of biopolymers is one of increasingly important applications of ultrafiltration (UF) membranes. The efficiency of separation is often evaluated through pilot experiments and seldom predicted. Available predictions focus on correlations between UF pore width and biopol ... mehr

A kinetic model for invertase‐induced sucrose hydrolysis: considering the initial time lag

Abstract The kinetics of sucrose hydrolysis by invertase was studied in order to find a comprehensive model for the reaction pathway and mechanism. First, three common models of Michaelis–Menten [MM], substrate inhibition [S2] and substrate clusters’ inhibition [S3(I)] were investigated ... mehr

Enhanced Silica Removal By Polyamine‐ and Polyacrylamide‐Polyaluminum Hybrid Coagulants

Abstract Silica removal is the main bottleneck for a high reuse of deinking paper mill effluents due to silica scaling on the reverse osmosis units generally used. This study analyzes the efficiency of inorganic‐organic hybrid coagulants formed by the combination of a polyaluminum nitrat ... mehr

Design and numerical simulation analysis of an integrative gas‐liquid‐solid separation hydrocyclone

Abstract Normally a gas‐liquid‐solid separation includes both de‐gassing and de‐sanding processes, which means a relatively more expensive facility investment and larger energy consumption. Based on an inner‐cone hydrocyclone developed before, an integrative de‐gassing and de‐sanding hyd ... mehr

Alle Fachpublikationen zu Verfahrenstechnik

Ultrafine and respirable particle exposure during vehicle fire suppression

Vehicle fires are a common occurrence, yet few studies have reported exposures associated with burning vehicles. This article presents an assessment of firefighters' potential for ultrafine and respirable particle exposure during vehicle fire suppression training. Fires were initiated withi ... mehr

Remarkably constant PAH concentrations in Swiss soils over the last 30 years

Although polycyclic aromatic hydrocarbons (PAH) are of concern due to their carcinogenic, mutagenic, and teratogenic properties and their ubiquitous occurrence in environmental compartments, only few studies assessed the temporal evolutions of PAH contents of soils over extended time period ... mehr

Preparation of triethylenetetramine‐modified zirconosilicate molecular sieve for carbon dioxide adsorption

Mesoporous molecular sieve Zr‐MCM‐41 was modified with triethylenetetramine (TETA) and tested for carbon dioxide (CO2) adsorption for the first time. The adsorbent was characterized by powder X‐ray diffraction, N2 adsorption‐desorption, energy dispersive spectrometer, Fourier transform‐infr ... mehr

Formation of Chlorination Byproducts and Their Emission Pathways in Chlorine Mediated Electro-Oxidation of Urine on Active and Nonactive Type Anodes

Chlorination byproducts (CBPs) are harmful to human health and the environment. Their formation in chlorine mediated electro-oxidation is a concern for electrochemical urine treatment. We investigated the formation of chlorate, perchlorate, and organic chlorination byproducts (OCBPs) during ... mehr

IJERPH, Vol. 12, Pages 10558-10574: The Effect of a 12-Week Omega-3 Supplementation on Body Composition, Muscle Strength and Physical Performance in Elderly Individuals with De ...

The aim of the study was to assess the effect of a polyunsaturated omega-3 fatty acids (PUFA) supplementation on the parameters of body composition, muscle strength and physical performance in elderly people with decreased muscle mass (DMM). Fifty three elderly people with an ALM index (the ... mehr

Alle Fachpublikationen zu Umwelttechnik
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